Recover data on OnePlus

I'm trying to recover data from my phone cache or anywhere else my phone hides data from me. I have the new OnePlus 12 as well as my previous OnePlus 8t. I'm not tech illiterate, and I'm not a tech genius. I'm looking for deleted data on both phones. I don't want to root the new OnePlus 12. I can root the OnePlus 8t, not that I know how to. I'm seeking an intelligent, patient, individual who can ensure accurate phone guidance, in layman's terms.